Hystrichosphaeridium lucidum

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"lucidum" Deunff, 1959, p.25–26, pl.9, figs.80,82–83,85–89.  Holotype: Deunff, 1959, pl.9, fig.82.  NOW Micrhystridium (Appendix A).  Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Appendix A), thirdly Solisphaeridium (Appendix A), fourthly (and now) Micrhystridium (Appendix A).  Age: Ordovician (Caradoc).

Parent: Hystrichosphaeridium